INSTALLATION
MANUAL
Intake system and ventilation
Industrial engines
DC09, DC13, DC16
01:02 Issue 6 en-GB |
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© Scania CV AB 2014, Sweden
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INSTALLATION |
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MANUAL |
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Intake air .................................................................................................................. |
3 |
Intake air taken from outside engine compartment............................................. |
4 |
Intake air taken from engine compartment ......................................................... |
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Air cleaners .............................................................................................................. |
8 |
Air cleaners with precleaner................................................................................ |
9 |
Air cleaners without precleaner......................................................................... |
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Crankcase ventilation............................................................................................ |
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Open crankcase ventilation ............................................................................... |
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Closed crankcase ventilation............................................................................. |
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Connection to turbocharger ................................................................................. |
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Cleanliness requirement .................................................................................... |
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Charge air pipe .................................................................................................. |
13 |
Stage IV/Tier 4f engines ................................................................................... |
14 |
01:02 Issue 6 en-GB |
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© Scania CV AB 2014, Sweden
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INSTALLATION
MANUAL
Intake air
If the intake line is located close to exhaust pipes or other hot parts, radiation protection should be used to limit unnecessary heating of the intake air.
REQUIREMENT!
The temperature of the intake air must not exceed the ambient temperature by more than 5°C.
If the intake air temperature upstream of the turbocharger continuously exceeds 30°C, then engine power may drop. If the engine is enclosed in some manner, make sure that there is an adequate flow of intake air.
The dependence of the engine power on intake air temperature is shown in the chart on the right. 100% engine power is shown under actual test conditions at the factory.
The engine air consumption in kg/min at full power and at different engine speeds is indicated in the tables showing the air consumption and radiated heat for the relevant engine type under Technical data in the Installation manual.
Intake air
A % 
100 
95
90
10 |
20 25 30 |
40 |
50 °C |
422 |
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B |
340 |
Engine power dependence on intake air temperature. 100% at 25°C, 1,000 mbar, engine power setting not corrected
A = Engine power
B = Intake air temperature
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INSTALLATION
MANUAL
Intake air
Intake air taken from outside engine compartment
In engine systems where the engine intake air comes from outside the engine compartment and is led via a fresh air line to the engine, the pressure drop for the intake system should be measured.
The air intake should be located so that the intake air is as clean as possible and so that neither the engine exhaust gases nor heated air from the engine compartment can mix with the intake air.
The intake air must not contain chemical pollutants, such as CFCs.
The air intake should be designed to exclude water, snow and contamination.
Maximum permissible pressure drop is 30 mbar. This value includes the pressure drop in the new air filter, connected coarse filter and in the fresh air line.
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INSTALLATION MANUAL
The following applies to the fresh air line:
•The fresh air line must not be routed with any sharp bends.
•The inside of the fresh air line must be flat and even.
•If a hose is used as a fresh air line, it must be hard so that it does not collapse onto itself.
It is not necessary to check the pressure drop in the following cases:
•The intake system comprises air hoses and air pipes from Scania's standard range.
•If the fresh air line is maximum 5 m and has an inside diameter of at least 160 mm for DC09 or 210 mm for DC13 and DC16, respectively.
If the planned fresh air line is longer than 5 m, the required diameter must be calculated as illustrated. The vacuum upstream of the turbocharger must then be measured.
The pressure drop measurement is normally made at the vacuum indicator. If the line between the filter and turbocharger is not a Scania standard line, the pressure drop should be measured on a straight section as close to the turbocharger as possible.
IMPORTANT!
The total pressure drop with a blocked air filter must not exceed 65 mbar.
Engine damage will not occur up to 100 mbar, but fuel consumption and smoke will increase. Above 100 mbar there is a risk that the air volume to the engine will be inadequate, resulting in breakdowns.
A (mm) |
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400 |
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25m |
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5m |
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300 |
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200
100
B 10 20 30 40 50 (m3/min)
Calculation of minimum diameter of the intake line
A = Intake line diameter
B = Air consumption
Intake air
340 421
01:02 Issue 6 en-GB |
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INSTALLATION
MANUAL
Intake air
Ventilation of the engine compartment with fresh air line to the engine
When the intake air to the engine is taken from outside the engine compartment, it is important to check that the temperature in the engine compartment does not exceed 90°C. If the temperature exceeds this value, there is a risk that the engine's electric components and control unit will malfunction.
If there is a risk that the temperature will exceed 90°C, the engine compartment must be ventilated.
When dimensioning the engine compartment ventilation, other air consumers in the engine compartment must also be considered.
The amount of radiated heat emitted by various engines is indicated under Technical data in the Installation manual.
The exhaust pipes should be insulated to reduce the radiated heat in the engine compartment. See Exhaust system in the Installation manual.
01:02 Issue 6 en-GB |
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© Scania CV AB 2014, Sweden
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